91238385 has 16 divisors (see below), whose sum is σ = 166836096. Its totient is φ = 41708928.

The previous prime is 91238359. The next prime is 91238449. The reversal of 91238385 is 58383219.

It is not a de Polignac number, because 91238385 - 2⁸ = 91238129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434364 + ... + 434573.

It is an arithmetic number, because the mean of its divisors is an integer number (10427256).

Almost surely, 2^91238385 is an apocalyptic number.

It is an amenable number.

91238385 is a deficient number, since it is larger than the sum of its proper divisors (75597711).

91238385 is a wasteful number, since it uses less digits than its factorization.

91238385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868952.

The product of its digits is 51840, while the sum is 39.

The square root of 91238385 is about 9551.8786110377. The cubic root of 91238385 is about 450.1865646172.

The spelling of 91238385 in words is "ninety-one million, two hundred thirty-eight thousand, three hundred eighty-five".